http://us.battle.net/wow/en/characte...n/Dei/advanced
Mastery stacking is pretty insane. There's a lot of times when you can melee for mana in hms this tier. I think the one big exception to that is Twins, and it is by far my weakest fight. I would suggest once you get Horridon's Last Gasp to go full mastery. Use CS/HS on cd and never cast LoD. Use EF on Beacon>You>OT>People taking damage>People about to take damage. But just get as many EFs out as you can without ruining your mana. Make a HUGE weakaura for the meta and try to get in two FoL in on every proc. Don't let the cast finish if the proc is going to run out. Treat Holy Pally like Ret, in the sense that building HoPo>almost everything.